OMAHA, Neb. — The chairman of the Nuclear Regulatory Commission will visit Nebraska's two nuclear power plants to check out the measures they've taken to battle flooding along the Missouri River.

The commission said Gregory Jaczko will visit Cooper Nuclear Station near Brownville on Sunday, and then tour Fort Calhoun Nuclear Power Plant near Blair on Monday. He will also take a helicopter tour of flooding on the river.

Fort Calhoun remains shut down because of concern about floodwaters, but a series of barriers have stopped the water's advance. The plant is run by the Omaha Public Power District.

Cooper Nuclear Station continues to operate at full capacity, but the Nebraska Public Power District is monitoring the river closely.

Previously, commission officials have said both utilities have taken appropriate measures to protect the power plants.